RF Presence-Gated Lighting Control Against Unauthorized Bluetooth Commands
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Solution Overview
Problem
Connected lighting devices are vulnerable to unauthorized control via short-range point-to-point radio frequency signals, allowing malicious users to manipulate lighting systems without permission.
Innovation Solution
Implement RF-based sensing to detect human presence and execute control commands only when presence is detected, using a processor to analyze changes in radio frequency signals and determine control commands from short-range signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a lighting device is made controllable by short-range point-to-point radio frequency signals, then ease of operation is improved, but security against malicious control is worsened
Solution Approach 1:
The patent introduces presence detection as an intermediary mechanism between the control signal and the lighting device execution. The system uses RF-based sensing to detect human presence and only executes control commands when presence is confirmed, thereby preventing unauthorized control while maintaining ease of operation for legitimate users
Solution Approach 2:
The system performs presence detection before executing control commands. By checking for human presence in advance and requiring confirmation within a predetermined time window, the system prevents malicious control attempts from being executed while allowing legitimate user commands to proceed normally
2Object-affected harmful factors
If presence detection is required before executing control commands, then security is improved, but response time and ease of operation are worsened
Solution Approach 1:
The system performs presence detection in advance and maintains a time window for command execution. By setting a predetermined time threshold (e.g., 5 seconds) during which commands are accepted, the system balances security requirements with responsive operation, preventing malicious control while avoiding excessive delays for legitimate users
Solution Approach 2:
The system dynamically adjusts its response based on presence detection results. When presence is detected, the system enters a state where control commands are accepted; when no presence is detected, the system rejects commands. This dynamic state transition allows the system to be responsive to legitimate users while blocking unauthorized control attempts
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents unauthorized control by ensuring that lighting devices are only operated when a user is present, deterring malicious actions and allowing users to quickly address any unauthorized control attempts.
Implementation Method 1
the processor is configured to receive one or more signals via the at least one input interface, determine changes in received radio frequency signals from the one or more signals, detect presence based on the changes
Data Source
AI summary
A device (1) controllable by a short-range point-to-point radio frequency signal, e.g. a Bluetooth signal from a mobile device (23), is configured to receive, e.g. from the mobile device and neighboring lighting devices (11-12), one or more signals which comprise the short-range point-to-point radio frequency signal, determine changes in received radio frequency signals from the one or more signals, detect presence, e.g. of a resident (51), based on the changes, determine a control command from the short-range point-to-point radio frequency signal, and execute the control command in dependence on the presence being detected.